Stability, plasticity, and adaptability of winter bread wheat under rainfed conditions with unstable moisture supply

Productivity, stability, plasticity, and adaptability of 14 varieties and 1 line of winter bread wheat were studied in Mountenous Shirvan, under rainfed conditions with no stable humidıty, in 2010/2011-2017/2018 vegetation years. Based on hydrometeorological indicators, the climatic conditions of 2010-2011, 2012-2013, 2016-2017, and 2017-2018 vegetation years were considered favorable for the development of winter wheat, and the climatic conditions of 2014-2015 and 2015-2016 were moderate and the climatic conditions of 2011-2012 and 2013- 2014 were found to be unfavorable. In 2011, 2013, 2017, and 2018, the average productivity for all genotypes was the highest and amounted to 61.3, 69.8, 66.9, and 66.6 cwt/ha, respectively. In 2015 and 2016, productivity was moderate, while in 2012 and 2014, it was at a low level. The average productivity over the years was in line with the climatic conditions during the vegetation year. According to the average of 8 years, Gobustan, 7th WON-SA №465, and Gyrmyzy gul 1 genotypes had the highest productivity - 66.4, 63.4, and 60.4 cwt/ha, respectively. Azeri, Bezostaya 1, Murov 2, Ruzi 84, and Sheki 1 varieties showed the lowest results. Taking into account the stability and plasticity of the studied varieties, it was concluded that Bezostaya 1, Ruzi 84, and Sonmez 01 varieties belong to the neutral type with the least plasticity (i.e. the type with wide adaptability). The varieties 7 thWON-SA №465 and Gobustan manifested a specific adaptation with high plasticity, increased productivity in response to high agrophone and favorable climatic conditions, as well as adaptability to adverse conditions. Therefore, the cultivation of these varieties in areas with unstable moisture supply, such as Mountainous Shirvan, and in a high agrophone, creates conditions for obtaining good results. In addition to not being adapted to unfavorable conditions, Tale 38 and Azamatli 95 varieties were found to have narrow adaptability and high plasticity in response to improved conditions